Key locking device



Patented June 1, 1954 KEY LOCKING DEVICE Oscar C. Gruender, Milwaukee, Wis., assignor to N ordberg Manufacturing Company, Milwaukee, Wis., a corporation of Wisconsin Application November 20, 1951, Serial No. 257,358

7 Claims.

My invention relates to an improvement in gyratory Crushers and has for one purpose to provide an improved locking assembly for the bowl or bowl support of the Crusher.

Another purpose is to provide an adjusting and locking assembly for gyratory crushers with vertically adjustable bowls in which the adjusting members are under compression instead of tension.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate the inventioin more or less diagrammatically in the accompanying drawings wherein:

Figure l is a plan view with parts omitted;

Figure 2 is a vertical axial section on the line 2 2 of Figure 1;

Figure 3 is a partial side elevation on an enlarged scale;

Figure i is a section on the line li-Ll of Figure 3; and

Figure 5 is a section on the line 5 5 of Figure 3.

Like parts are indicated by like symbols throughout the speciiication and drawings.

Referring to the drawings, l generally indicates a circumferential main frame member, having an outwardly extending top flange 2. Connected to, or formed integrally with the circum rerential main frame member l, is an internal hub 3 within which the normally xed central pillar l is secured. The pillar li has an upwardly extending shaft portion 5 having a generally cylindrical exterior bearingsurface 6. The central hub or fixed sleeve 3 of the frame is connected to the circumferential frame member by any suitable outwardly extending spider portions 'a'. I illustrate also an intermediate frame portion 8, supporting a bearing ring 8u, having a generally spherical bearing surface concentric with the point X.

Mounted for rotation about the bearing i5 of the post 5 is an eccentrically apertured sleeve 9. The sleeve 9 has an inner bearing surface or element lil surrounding and conforming to the exterior bearing surface 5 of the post 5. It is formed also with an outer cylindrical bearing surface il. The axes of its inner and outer bearing surfaces are at a slight angle to each other, but converge and intersect at the point X of Figure 2.

i2 generally indicates a gyrated head structure. The head is shown as having a generally central downwardly extending sleeve I3 surrounding and conforming generally to the bearing surface il. It may include an internal removable bearing sleeve 13a. It also has a generally cylindrically surfaced spherical bearing portion lli received upon the removable bearing ring 8a on the cylindrical bearing support 8. It will be understood that the parts are so formed that when the sleeve 9 is rotated it imparts gyration to the head about the center X, the head being supported upon the circumferential bearing 8.

As means for rotating the sleeve 9 and thus gyrating the head, illustrate any suitable drive shaft l5, carrying a pinion i6 in mesh with a gear 56a, secured to or positioned on the lower end of the eccentrically apertured sleeve 9. Any suitable pulley, or other means not herein shown, may be employed to impart rotation to the shaft l5 and thus gyration to the head. The head is shown as carrying any suitable crushing ring or member Il, opposed to the crusher bowl liner it.

In order to support the bowl liner i8 and to provided a normally fixed member toward and away from which the gyrated crushing ring i? moves, I provide the following structure. Re movably secured upon the top flange 2 of the main frame member l, I illustrate the ring 29 having a circumferential downwardly extending flange 2 l, which surrounds and conforms to the outer edge of the liange 2. The ring 2B is provided with an inward upwardly extending flange 22, having an inner conic face 23 and an outer generally upright face 24. 25 is a bowl support apertured to conform generally to the flange 22. It is normally held fixed in relation to the flange 22 by tension members or bolts 26, which pass through the ring 2li and the ange 2 and are surrounded by compressed coil springs 21 and which are normally eiiective iirmly to hold the bowl support 25 in the position in which it is shown in Figure 2. However, they will yield to predetermined excess crushing stresses. YIt will be understood that any suitable abutment or abutments at the ends of the bolts 21% may be adjusted to maintain any desired compression on the springs 21.

The bowl support 25 is provided with a suitable number of outwardly extending lugs 28, apertured as at 29 to permit the passage therethrough of the bolts 2G, the bolts being upwardly headed as at 3G. The bowl support 25 includes a generally cylindrical upward extension 35, this extension being inwardly screw-threaded as at 36. The bowl proper 3'! has a generally cylindrical outer portion 38 externally screw-threaded as at 39 in mesh with the internal screw threads of the members 35 and 36. The bowl liner i8 is secured to the bowl 3l by any suitable locking assembly, generally indicated as including the parts Llc and di, the details of which do not oi themselves form part of the present invention but are described and claimed in my copending application 317,193, iiled October 28, 1952, and are disclosed in my copending application 161,769, filed May 13, 1950 now Patent Number 2,670,142. 42 is any suitable hopper member, removably secured to the bowl 3l.

The bowl member 33 is shown as having a top outwardly extending circumferential ange 50, to which is bolted the ring 5i. rIhe ring has a plurality of lugs or abutments 52 which are preferably equally spaced. Directly below each such lug 52, I illustrate a pair of generally radial ears or projections 55 between which are located adjustment shims 54 and vertical struts 55, which engage the circumferential top flange or abutment a of the bowl support 25. On top of each set of shims 54 rests the grooved or recessed wedge block 5B, which is tapered to accommodate the tapered key 57. A guard plate 5B may retain the wedges while the keys 5l are driven home. 'Ihe shims thus employed and the vertical struts are under compression, whereas in prior art structures of relevant type tensioned adjustment screws are employed.

Referring to Figure 5, the guard plate 58 is slidably positioned within the space formed by the lugs 53 and angle members 53, which may be welded to the lugs. The guard plate 53 is provided with a ange 55 and stop members Si, which may engage the upper ends of the angie members 59, as illustrated in Figures S and 4.

It will be realized that whereas I have described and shown a practical and operative device, nevertheless many changes may be made in size, shape, number and disposition of parts. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting me to my specific showing herein.

The use and operation of my invention are as follows:

I illustrate a crushing or grinding structure in which the bowl 3l, 33 and its supporting structure are normally heldin the position in which they are shown in Figure 2. Since uncrushable material, such as steel, dipper teeth or other particles of metal, may pass through the crushing zone and since material under some circumstances may pack, in the crushing zone, into an uncrushable mass, I employ yielding means which include the bolts 25, which may be surrounded by springs 2l, or which, if desired, may be used in connection with pneumatic or hydraulic Crusher cylinders. The bowl 3i, 3S is adjustable on or in the bowl support 35. In order to hold it in adjusted position and to reduce the shock to the threads, I provide the above-described adjusting shims 54 beneath the wedge blocks 56, which receive the tapered keys 5i'. The tapered keys 5l are driven between the wedge blocks 56 and the lugs or abutments 52. The vertical struts 5% and the shims are under compression and no tensioned members are employed in connection with the adjustment of the bowl and the locking of the bowl in adjusted position.

I claim:

1. In a supporting and locking assembly for an adjustable crusher bowl adapted for use with a gyrated Crusher head, a bowl supporting ring, a bowl structure mounted on and adjustable in relation to said ring, and a locking assembly interposed between said ring and said bowl structure, including an abutment on said ring, an opposed abutment on said bowl structure and a tapered key wedged between said abutments and adapted to maintain said locking assembly under compression between said ring and bowl structure.

2. The structure of claim 1, characterized by and including a plurality of said locking assemblies circumferentially spaced about the exterior of the bowl structure.

3. The structure of claim 1, characterized in that said locking assembly includes a plurality of shims interposed between and under compression between said key and one of said abutments.

4. The structure oi claim 1, characterized in that said locking assembly includes a strut and a wedge block interposed between said key and one of said abutments and positioning means for guiding the key and for guiding the strut.

5. The structure of claim l, characterized in that said locking assembly includes a guide formed on the exterior of the bowl structure, and a strut within said guide, said lrey being formed and adapted to maintain strut in compression between the ring and the bowl structure.

6. The structure of claim 1, characterized in that said locking assembly includes a plurality of shims positioned between said key and one of said abutments, and means for preventing unintended movement of said shims, said key being adapted to apply compression to said shims, whereby the locking assembly is put in compression between the ring and the bowl structure.

'i'. In a supporting and locking assembly for an adjustable crusher bowl adapted for use with a gyrated crusher head, a bowl supporting ring member, a bowl structure member threadedly mounted on and adjustable in relation to said ring member, and a locking assembly interposed between said ring member and said bowl member, said locking assembly including abutment means on each of said members, guide means on one of said members, a strut positioned within said guide means and abutting against one ci said abutment means, a wedge block positioned within said guide means, a tapered key forced between said wedge block and the abutment means on the other member, said wedge block having a recessed edge, said key being seated in said recessed edge, and a plurality of shims compressed between said wedge block and an edge of said strut within said guide means and compressed upon the entrance of said key between said block and said wedge abutting means.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 564,596 Leonard Sept. 5, 1893 1,868,338 Symons July 19, 1932 2,438,049 Gruender Mar. 16, 1948 2,553,988 Stevens May 22, 1951 

